[6.0] daa0f945a Printf format fix

[Dridi Boukelmoune]

commit daa0f945a38d774d289f558cf006ae4d71dd03ef
Author: Poul-Henning Kamp <phk at FreeBSD.org>
Date:   Tue Dec 4 21:53:36 2018 +0000

    Printf format fix

diff --git a/bin/varnishd/cache/cache_vcl.c b/bin/varnishd/cache/cache_vcl.c
index 410724e5d..4cf196ea0 100644
--- a/bin/varnishd/cache/cache_vcl.c
+++ b/bin/varnishd/cache/cache_vcl.c
@@ -212,7 +212,7 @@ VCL_Panic(struct vsb *vsb, const struct vcl *vcl)
 		VSB_printf(vsb, "conf = NULL\n");
 	} else {
 		PAN_CheckMagic(vsb, vcl->conf, VCL_CONF_MAGIC);
-		VSB_printf(vsb, "syntax = \"%d\",\n", vcl->conf->syntax);
+		VSB_printf(vsb, "syntax = \"%u\",\n", vcl->conf->syntax);
 		VSB_printf(vsb, "srcname = {\n");
 		VSB_indent(vsb, 2);
 		for (i = 0; i < vcl->conf->nsrc; ++i)